outer box; outer casing
Refers to the outermost box or casing of a product, such as packaging or a protective cover.
この商品は上箱が少し傷んでいます。
The outer box of this product is slightly damaged.
Compound of 上 (うわ, 'upper, outer') and 箱 (はこ, 'box'). The reading うわばこ follows rendaku voicing of はこ to ばこ.